#include<stdio.h>
int main(void)
{
    int feet,fathoms;
    fathoms = 2;
    feet = 6*fathoms;
    printf("There are %d feet in %d fathoms!\n", feet, fathoms);
    printf("Yes, I said %d feet!\n",6*fathoms);

    return 0;
}

/*two_func.c -- 一个文件包含两个函数*/
#include<stdio.h>
void butler(void);
int main(void)
{
    printf("I will summon the butler function.\n");
    butler();
    printf("Yes.Bring me some tea and writeable DVDs.\n");
    return 0;
}
void butler(void)
{
    printf ("You rang,sir?\n");
}